Hi Bruce
It seems that this is the issue. The rear carb is "hanging" somehow and that is why my mechanic said I should buy needles and nozzles for both carbs.
As you are from ztherapy, could you be so kind and send me the direct link on your site where I can place the order?
Thanks - Daniel ( and thanks to all others who responded !)

Thanks EutDat
This Kit I have bought some times ago, but my technician says that there are two parts not included in this kit which he wants to change:
-Needle, Nr. 9 on the HITACHI Sheet (attached)
-Nozzle, Nr. 13 on the HITACHI Sheet (attached)
Are they not part of any Kit and must be ordered separately?
Where can I buy these two parts?
Even though Im in Switzerland I think the USA are best place to find parts for Z-Cars.
Thanks - Daniel
HITACHI Carburetor HJG46W.PDF

Hello All
I'm new to this forum but not to Z-Cars. I first drove a 240Z in 1979 and in the years between there were 280ZX, 280ZX-TT, 300ZX and again a 240Z.
My green 1972 240Z, was probably produced in September/1971 (VIN 048531)
I would like to refresh the carbs and look for a repair Kit. Seems not so easy.
I assume I do have the HITACHI Carbs (Round Top / 3 screws)
Where can I buy such a repair Kit?
Thanks from Switzerland - Daniel